{"action":"Upgrade ntp to 1:4.2.4p8+dfsg-1 or later.","affected":[{"fixed":"1:4.2.4p8+dfsg-1","introduced":"0"}],"component":"ntp","cve_ids":[],"ecosystem":"Debian","ecosystem_qualifier":"Debian:11","exploited":false,"fixed_versions":["1:4.2.4p8+dfsg-1"],"id":"tcs_01M5N9CKWJ2T9KN8XFMZVRNV2A","modified_at":"2026-08-31T06:47:40.876565785Z","published_at":"2009-12-09T18:30:00.390Z","references":["https://osv.dev/vulnerability/DEBIAN-CVE-2009-3563","https://security-tracker.debian.org/tracker/CVE-2009-3563"],"severity":{"label":"unknown"},"sources":[{"source":"osv","source_id":"DEBIAN-CVE-2009-3563","url":"https://osv.dev/vulnerability/DEBIAN-CVE-2009-3563"}],"summary":"ntp_request.c in ntpd in NTP before 4.2.4p8, and 4.2.5, allows remote attackers to cause a denial of service (CPU and bandwidth consumption) by using MODE_PRIVATE to send a spoofed (1) request or (2)"}